Probably worth a look if tutorials are your cup of tea, or you're interested to visualize a scripting issue you wanna get solved
So, here we go ...
(OH NO, he wants me to read all that text I'd prefer to watch [this] introduction video instead )
Screencastify - a lightweight screen recorder for Chrome.
Capture, edit and share screencasts in seconds.
Ready, set, record.
Capture your entire desktop, browser tab or webcam. Narrate with your built-in or external microphone, and embed your webcam to add a personal touch.
Edit to perfection.
During your recording, annotate with our pen tool. Then crop and trim your clip in our browser-based editor. Coming soon: merge and split clips!
Share with the world.
Your recordings will automatically save to your Google Drive. Publish them directly to YouTube or share the link with your audience.
The free plan contains this (what I think is fair enough and fits our needs)
10 minute video length limit
50 videos / month
PS. There's also an [API] available !
The Screencastify API allows users to share recordings with third-party Applications/Sites from within Screencastify or (optionally) control recording from the site.
Sharing from within Screencastify
Apps are shown as an additional upload target in Screencastify's share dialog.
Screencastify can also be configured to "Record for an App". This automatically shares all new recordings with the configured App. It's the responsibility of the App to handle and store such recordings. Record for App Flow Demo Video
This is a pure client-side API, recordings are passed to Apps as regular File objects (like from a file picker) locally.
Controlling recording from the site
The recording API allows to initiate and control record from a site. To get an idea how this works, try the In-Site Recorder Demo.
The resulting video is shared in the same way as recordings made with the "Record for an App" feature.
PS. You have a boring life and/or you prefer to watch lengthy tutorials over sharing your time with your creepy neighbours: [Super Screencastify Activities for Schools - 01:07:05]